Roll hoop for a quadrotor model helicopter



FIG. 1 is a, top, left, front perspective view of a roll hoop for a quadrotor model helicopter;

FIG. 2 is a bottom, right, rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a right side elevation view thereof; and,

FIG. 8 is a left side elevation view thereof.

Structural elements depicted by broken lines have been shown for the purpose of illustrating portions of the roll hoop for a quadrotor model helicopter that form no part of the claimed design. 

CLAIM We claim the ornamental design for a roll hoop for a quadrotor model helicopter, as shown and described. 